For the past seven years, this German set-up has been looking for gravitational waves – ripples in space-time thrown off by super-dense astronomical objects such as neutron stars and black holes. GEO600 has not detected any gravitational waves so far, but it might inadvertently have made the most important discovery in physics for half a century.
For many months, the GEO600 team-members had been scratching their heads over inexplicable noise that is plaguing their giant detector. Then, out of the blue, a researcher approached them with an explanation. In fact, he had even predicted the noise before he knew they were detecting it. According to Craig Hogan, a physicist at the Fermilab particle physics lab in Batavia, Illinois, GEO600 has stumbled upon the fundamental limit of space-time – the point where space-time stops behaving like the smooth continuum Einstein described and instead dissolves into “grains”, just as a newspaper photograph dissolves into dots as you zoom in. “It looks like GEO600 is being buffeted by the microscopic quantum convulsions of space-time,” says Hogan.

(Image: Wolfgang Filser / Max Planck Society)
If this doesn’t blow your socks off, then Hogan, who has just been appointed director of Fermilab’s Center for Particle Astrophysics, has an even bigger shock in store: “If the GEO600 result is what I suspect it is, then we are all living in a giant cosmic hologram.”
The idea that we live in a hologram probably sounds absurd, but it is a natural extension of our best understanding of black holes, and something with a pretty firm theoretical footing. It has also been surprisingly helpful for physicists wrestling with theories of how the universe works at its most fundamental level.
The holograms you find on credit cards and banknotes are etched on two-dimensional plastic films. When light bounces off them, it recreates the appearance of a 3D image. In the 1990s physicists Leonard Susskind and Nobel prizewinner Gerard ‘t Hooft suggested that the same principle might apply to the universe as a whole. Our everyday experience might itself be a holographic projection of physical processes that take place on a distant, 2D surface.
The “holographic principle” challenges our sensibilities. It seems hard to believe that you woke up, brushed your teeth and are reading this article because of something happening on the boundary of the universe. No one knows what it would mean for us if we really do live in a hologram, yet theorists have good reasons to believe that many aspects of the holographic principle are true.
However Danzmann is cautious about Hogan’s proposal and believes more theoretical work needs to be done. “It’s intriguing,” he says. “But it’s not really a theory yet, more just an idea.” Like many others, Danzmann agrees it is too early to make any definitive claims. “Let’s wait and see,” he says. “We think it’s at least a year too early to get excited.”
So what would it mean it if holographic noise has been found? Cramer likens it to the discovery of unexpected noise by an antenna at Bell Labs in New Jersey in 1964. That noise turned out to be the cosmic microwave background, the afterglow of the big bang fireball. “Not only did it earn Arno Penzias and Robert Wilson a Nobel prize, but it confirmed the big bang and opened up a whole field of cosmology,” says Cramer.
Hogan is more specific. “Forget Quantum of Solace, we would have directly observed the quantum of time,” says Hogan. “It’s the smallest possible interval of time – the Planck length divided by the speed of light.”
More importantly, confirming the holographic principle would be a big help to researchers trying to unite quantum mechanics and Einstein’s theory of gravity. Today the most popular approach to quantum gravity is string theory, which researchers hope could describe happenings in the universe at the most fundamental level. But it is not the only show in town. “Holographic space-time is used in certain approaches to quantising gravity that have a strong connection to string theory,” says Cramer. “Consequently, some quantum gravity theories might be falsified and others reinforced.”
Hogan agrees that if the holographic principle is confirmed, it rules out all approaches to quantum gravity that do not incorporate the holographic principle. Conversely, it would be a boost for those that do – including some derived from string theory and something called matrix theory. “Ultimately, we may have our first indication of how space-time emerges out of quantum theory.” As serendipitous discoveries go, it’s hard to get more ground-breaking than that. (Source-NewScientist)
Let yourself dwell on the possibilities raised in this article over the weekend. Think about the ramifications of finding out that our view of reality may be completely in error due to our limited senses as you go about your chores and do your shopping. Can we ever hope to step outside our conditioned world view and perceive reality as it truly exists?
Comment Platforms – A challenge to compare
As soon as I installed TweetDeck on my Linux partition today and fired it up, I noticed a Twitter reply from December 16th I hadn’t noticed before. So first I’ll apologize to db0 for my inattentiveness and now I’ll get to the substance of his Tweet.
Here is db0’s challenge:
The commenting systems in question are Disqus, Intense Debate and the built-in commenting structure of Word Press/Blogger/What_have_you. I use Disqus on this blog (and on most the blogs I’ve created) and Intense Debate on one other. I don’t rely on WP’s built-in commenting option on any blog except one with wordpress.com.
Ironically, I installed Intense Debate on that one site because I was hoping for a lot of, well, intense debate. I figured Disqus could handle the volume of comments I anticipated on my other blogs, especially this one. I like to think I’m far more controversial over there than I am here. Instead this blog has garnered far more comments than the one with ID installed.
I have StumbleUpon and it’s devotees (addicts?) to thank for that. Most of my traffic here comes from SU. Since neither of tem are tech blogs or gadget blogs, my comments will never make a dent on Digg or Techmeme. StumbleUpon is Digg for blogs that address society or philosophy. StumbleUpon is also similar to crack cocaine. Once you start clicking that damned “Stumble” button…
I appreciate the differences between IntenseDebate (ID) and Disqus, both have their strengths and weaknesses. The dashboard for ID offers more options than Disqus’ interface. But I find I’m not using the extra options much. Disqus’ simpler dashboard allows me to do everything I need it for on a regular basis. Since both allow me to reply by email, I often don’t notice which system I’m using, since to me it’s Google’s Gmail interface. Gmail provides organization by threading the comments better than either ID or Disqus.
They both integrate into the WP backend pretty much the same. I don’t read or write comments via cell phone, so how well they do that, I don’t know. It’s not a factor.
Seeing as how I get far fewer comments than db0 or vjack do, I’m not the most informed person to judge these two services. They both work about the same for me and I prefer both of them to the built-in comments. I also don’t need the advanced features available, so they’re pretty much wasted on me. A lot is wasted on me. And I get wasted a lot. That’s how I maintain balance in my life. Zen, you know.
I haven’t a clue who among other bloggers I know well enough to tag (those I suspect may read this whole post and see themselves mentioned) would be interested in debating this issue. So if you’ve read this far and have an opinion on this topic, join in and consider yourself tagged.